X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1006797 for flyrotary@lancaironline.net; Sun, 19 Jun 2005 11:18:37 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=13brv3@bellsouth.net Received: from ibm56aec.bellsouth.net ([65.6.194.9]) by imf16aec.mail.bellsouth.net with ESMTP id <20050619151750.GCPR13701.imf16aec.mail.bellsouth.net@ibm56aec.bellsouth.net> for ; Sun, 19 Jun 2005 11:17:50 -0400 Received: from rd ([65.6.194.9]) by ibm56aec.bellsouth.net with ESMTP id <20050619151750.VPQO11957.ibm56aec.bellsouth.net@rd> for ; Sun, 19 Jun 2005 11:17:50 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Making progress on Chris n Dave's Velocity Engine Date: Sun, 19 Jun 2005 10:17:51 -0500 Message-ID: <000001c574e2$0f550c30$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C574B8.267F0430" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C574B8.267F0430 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit There are several features to the stock throttle body that make it attractive. The first is that there are separate butterflies for the primary and secondary runners. This allows airflow at low power settings to be channeled mostly through the primaries, increasing the flow velocity through the primaries. Hi Dave, I also like the idea of having the primaries open before the secondaries. It allows you to have good throttle response, and yet make the secondaries large enough for a low MAP loss at WOT. Where are your injectors going to be? Cheers, Rusty (off to fly) ------=_NextPart_000_0001_01C574B8.267F0430 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

    There are several features to the = stock=20 throttle body that make it
attractive. The first is that there are = separate=20 butterflies for the
primary and secondary runners. This allows = airflow at low=20 power settings
to be channeled mostly through the primaries, = increasing the=20 flow
velocity through the primaries.

 
Hi=20 Dave,
 
I also = like the idea of=20 having the primaries open before the secondaries.  It allows = you to=20 have good throttle response, and yet make the secondaries large enough = for a low=20 MAP loss at WOT.  
 
Where = are your injectors=20 going to be? 
 
Cheers,
Rusty = (off to=20 fly)



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